How to correctly set up custom events?

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What is the correct procedure to set up and register custom events for the Android platform.

I have been through the documentation repeatedly - however cannot see a simple straightforward example of how to do this. 

What I need:

From clicking a notification, i need to be able to distinguish between 3 scenarios - that need to perform different actions

- The 3 scenarios are:

    1. Simple deep link message sent that contains a URI - based on the URI - the user will be taken to either of two different Activities (screens)

    2. An inbox message sent ,that when the notification is received - the user clicks on it - and the Inbox message opens directly into a default browser, displaying the html/css

    3. A push message that contains some data - that when the user clicks on the notification - the user will be taken to different Activities (screens), based on that data

What I have:

In trying to follow the documentation, and sample app, I have created 3 classes that subclass the Action class 

One example

public class InboxMessageCustomAction extends Action {

    public static final String DEFAULT_REGISTRY_NAME = "open_mc_action";

    /**
     * Default registry short name
     */
    public static final String DEFAULT_REGISTRY_SHORT_NAME = "^mc";

    public static final String MESSAGE_ID_PLACEHOLDER = "auto";

    @Override
    public boolean acceptsArguments(@NonNull ActionArguments arguments) {
        switch (arguments.getSituation()) {
            case SITUATION_PUSH_OPENED:
            case SITUATION_WEB_VIEW_INVOCATION:
            case SITUATION_MANUAL_INVOCATION:
            case SITUATION_FOREGROUND_NOTIFICATION_ACTION_BUTTON:
            case SITUATION_AUTOMATION:
                return true;

            case SITUATION_BACKGROUND_NOTIFICATION_ACTION_BUTTON:
            case SITUATION_PUSH_RECEIVED:
            default:
                return false;
        }
    }

    @NonNull
    @Override
    public ActionResult perform(@NonNull ActionArguments arguments) {

        String messageId = arguments.getValue().getString();

        if (MESSAGE_ID_PLACEHOLDER.equalsIgnoreCase(messageId)) {
            PushMessage pushMessage = arguments.getMetadata().getParcelable(ActionArguments.PUSH_MESSAGE_METADATA);
            if (pushMessage != null && pushMessage.getRichPushMessageId() != null) {
                messageId = pushMessage.getRichPushMessageId();
            } else if (arguments.getMetadata().containsKey(ActionArguments.RICH_PUSH_ID_METADATA)) {
                messageId = arguments.getMetadata().getString(ActionArguments.RICH_PUSH_ID_METADATA);
            } else {
                messageId = null;
            }
        }

        if (UAStringUtil.isEmpty(messageId)) {
            UAirship.shared().getInbox().startInboxActivity();
        } else {
            UAirship.shared().getInbox().startMessageActivity(messageId);
        }

        return ActionResult.newEmptyResult();
    }

    @Override
    public boolean shouldRunOnMainThread() {
        return true;
    }
}

In my launch Activity I have a method that monitors the registration of these Actions

public class ActionMonitor {

    public ActionMonitor() { }

    public void start() {

        InboxMessageCustomAction inboxMessageCustomAction = new InboxMessageCustomAction();
        CustomSpecialMessageAction specialMessageAction = new CustomSpecialMessageAction();
        DeepLinkCustomAction deepLinkCustomAction = new DeepLinkCustomAction();

        ActionRegistry registry = UAirship.shared().getActionRegistry();

        registry.getEntry(DeepLinkAction.DEFAULT_REGISTRY_NAME).setDefaultAction(inboxMessageCustomAction);
        registry.getEntry(DeepLinkAction.DEFAULT_REGISTRY_NAME).setDefaultAction(specialMessageAction);
        registry.getEntry(DeepLinkAction.DEFAULT_REGISTRY_NAME).setDefaultAction(deepLinkCustomAction);

        
        ActionRunRequest.createRequest("deep_link_action")
                .setValue("actionValue")
                .setSituation(SITUATION_PUSH_OPENED)
                .run();
        
        ActionRunRequest.createRequest("my_custom_special_message_action")
                .setValue("actionValue")
                .setSituation(SITUATION_PUSH_OPENED)
                .run();

        ActionRunRequest.createRequest("inbox_message_custom_action")
                .setValue("actionValue")
                .setSituation(SITUATION_PUSH_OPENED)
                .run();
        
    }

And have set up the auto takeoff by registering in the AndroidManifest that references this class:

public class UASetup extends Autopilot {

    @Override
    public void onAirshipReady(@NonNull UAirship airship) {

        PushManager pushManager = UA.getPushManager();
        String channelId = pushManager.getChannelId();

        airship.getActionRegistry()
                .registerAction(new CustomSpecialMessageAction(), "special_message_action");

        airship.getActionRegistry()
                .registerAction(new DeepLinkCustomAction(), "deep_link_action");

        airship.getActionRegistry()
                .registerAction(new InboxMessageCustomAction(), "inbox_message_custom_action");

        Timber.d("Urban airship channel id %s",channelId);
    }

    @Override
    public AirshipConfigOptions createAirshipConfigOptions(@NonNull Context context) {
        AirshipConfigOptions options = new AirshipConfigOptions.Builder()
                .setProductionAppKey("xxxxxxxxxxxxxxxxxxxx")
                .setProductionAppSecret("xxxxxxxxxxxxxxxxx")
                .setDevelopmentAppKey("xxxxxxxxxxxxxxxxxxx")
                .setDevelopmentAppSecret("xxxxxxxxxxxxxxxx")
                .setInProduction(!BuildConfig.DEBUG)
                .setFcmSenderId("000000000000") // FCM/GCM sender ID
                .setNotificationIcon(R.drawable.tickets)
                .setNotificationAccentColor(Color.BLUE)
                .build();

        return options;
    }
}

What I want

What i want to know is, am i missing any steps. Also - how do I distinguish between these 3 notifications. For instance if users click on a notification - it could be any of the three - but they all have different actions to perform.

I hope I am explaining myself correctly. Any help would be appreciated 

Many thanks

Paul